black olive bonsai - Obviously, where sustained lows are expected pop an olive in an open, unheated greenhouse or stand it underneath the bench to afford overhead cover but do avoid dark sheds or closed areas such as garages or cloches, olives need GOOD ventilation all the time. Keeping an olive dry in winter not only helps in relation to protecting it against cold but it will also preserve that valuable craggy bark and also any significant deadwood. Trees that are overwintered in the dry will grow much more strongly in summer as the roots will emerge in the spring in significantly better condition. In summary be more concerned about the wet and less about the cold, particularly if your olive is planted in less than ideal soil. How Do You Prune A Black Olive Tree? The open center can provide the best-trained olive trees. Always start with the way while planting the tree. An angular cut on the central leader almost 5 feet above the bud should be the next step. Remove the lateral branch